Loom for weaving



Feb. 8, 1938. J. WOLFENSBERGER LOOM FOR WEAVING Filed Jan. 9, 1936 Patented Feb. 8, 1938 UNITED STATES PATENT OFFICE LOOM FOR WEAVING Jakob Wolfensberger, Bauma, Switzerland Application January 9, 1936, Serial No. 58,429 In Switzerland January 16, 1935 1 Claim. (Cl. 139-491) This invention relates to a weaving loom with thrust rod 6 is mounted and which moves in the a stationary frame. sliding track II. By this device a variation of According to the invention the beating-up the path described by the beating-up comb 9 is comb thereof is mounted between the ends of rendered possible. thrust rods each of which is jointed at one end The method of operation is as follows. 5 to a rotary crank and has its other end mounted By turning the crank shaft 1, the beating-up in floating manner, and one of the longersides comb 9 describes with the upper ends of the of the resulting substantially ovoid or pearprongs, a substantially pear-shaped or ovoid shaped path which the operative part of the curve ID of which the point is located at the 10 comb follows in making a beating-up movement beat-up edge H of the woven material. By 10 is arranged to lie within the zone of the shed. means of shuttles 16, the track of which being The invention provides, therefore, a simple formed by the reed and the rake, a Weft is inmeans whereby the comb makes its beating-up serted when the shed is open. At the moment strokes in the shed and its return strokes in a the shuttle passes out of the shed the crank pins path lying outside the shed zone so that weft l have reached the rear dead centre, the beating 15 can be laid during the return movements, the prongs It! being in the position before fully entime available for the laying being increased or tering the shed. Simultaneously, however, the it being possible to run the loom faster than has shed commences to change and the Points Of the generally been the case hitherto, beating prongs 10 are able to follow the lower The shuttle track is preferably formed by a warp during the upward movement up to the 20 rake and the reed of the stationary slay which middle, that is to say, until the two warps meet. also provides a lateral guide for the prongs of The weft thread is located and held between the the beating comb. warp threads and is now beaten-up by the comb The invention will now be described with ref- 9 or beating-up prongs I0, while the shed conerence to the accompanying drawing, wherein: tinues to change completely. The points of the 25 Fig. 1 shows a diagrammatic cross section of prongs pass closely over the dents of the reed, the weaving machine; the weft is caught by the prongs without fail Fig. 2 shows a diagrammatic plan (beating immediately after the descending upper Warp comb in the beating-up position); has crossed into the comb. Already before the Fig. 3 shows a modification of the suspension front dead centre of the crank is reached (beat- 30 for the thrust rods in adjustable sliding guides. ing position shown in chain dotted lines in Fig. The reed 2 is connected tothe stationary slay 1) the shed may be opened to such an extent I. The shuttle track consists of a rake in the that the shuttle may again enter. It then has fOIm of de plates 3 which are Secured at One available the period of time corresponding to end in the r n v se me 4 and wh w half a revolution of the crank shaft for travers- 35 the other ends reach up to dents of the reed 5. ing th warp, th t i to y, untfl shortly b f re The shutt es used y be of y Standard p the rear dead centre is reached. It is thus possi- The thrust rods 6 'a e reciprocated by the Crank ble to provide for the shuttle about half the time p 7 and rock W tiheil front ends 011 rocking of operation more than is possible in an ordinary 4O levers 8. Between the ends of the thrust rods 1 In th d ith th same t of 40 6 is secured the beating comb 9 with the beating movement of t tt t crank haft may prongs l0. Each prong l0 slides between two move about 5 fa t r During the return guide plates 3 without completely leaving these. movement the beating comb, ft the comp1e A Sheddmg deylce a of t tion of the beating, is lowered and then leaves known and suitable construction is arranged in the Shed It then again moves upwardly closely fi usual manner i f motlon along the reed 2 when the crank approaches its mg no part of the mventlon 15 shown only m rear dead centre. In the meantime, however, the

diagrammatical manner.

The suspension of the thrust rods 6 may, for sggiig has been Inserted and the operatlon example, also be efiected as shown in Fig. 3. 50 The sliding guide n is secured to the shield l3. The Present P i thus Permlt? of The screw 20 which is located in the curved slot taining a considerable increase in efficiency as n" enables t liding guide n t be moved compared with the usual methods. The warp through a, predetermined amount and firmly material receives an extremely careful treatment,

clamped. I9 is the sliding block in which the as it is only combed in one direction. 55

What I to secure by-U. :Letters Patent is: V In a weaving loomhaying a shed, astatiofiary rake, a beating-11p comb, thrust mods between the ends of which said. comb is mounted, a shaft having rotary ranks to which one end of each of the respective thy st ,rogis is connected, pivoted links to which the other end of each of rt he respective thrust rods is connected, in virtue of which the operative end of the prong; of said'comb is caused to move in a pear-shaped path in making a beating-up movement, the path lying within the zone of the shed. i

r JAKOB WOLEENSBERGER. 

